src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_ITEM_SELECTED)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_ITEM_DESELECTED)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  47 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  51
  52 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  53
  54 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  55
  56 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  57     EVT_PAINT(wxRichTextCtrl::OnPaint)
  58     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  59     EVT_IDLE(wxRichTextCtrl::OnIdle)
  60     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  61     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  62     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  63     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  64     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  65     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  66     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  67     EVT_CHAR(wxRichTextCtrl::OnChar)
  68     EVT_SIZE(wxRichTextCtrl::OnSize)
  69     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  70     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  71     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  72
  73     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  74     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  75
  76     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  77     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  78
  79     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  80     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  81
  82     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  83     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  84
  85     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  86     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  87
  88     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  89     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  90
  91     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  92     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
  93 END_EVENT_TABLE()
  94
  95 /*!
  96  * wxRichTextCtrl
  97  */
  98
  99 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 100
 101 wxRichTextCtrl::wxRichTextCtrl()
 102               : wxScrollHelper(this)
 103 {
 104     Init();
 105 }
 106
 107 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 108                                wxWindowID id,
 109                                const wxString& value,
 110                                const wxPoint& pos,
 111                                const wxSize& size,
 112                                long style)
 113               : wxScrollHelper(this)
 114 {
 115     Init();
 116     Create(parent, id, value, pos, size, style);
 117 }
 118
 119 /// Creation
 120 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style)
 121 {
 122     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 123                                 style|wxFULL_REPAINT_ON_RESIZE))
 124         return false;
 125
 126     if (!GetFont().Ok())
 127     {
 128         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 129     }
 130
 131     GetBuffer().Reset();
 132     GetBuffer().SetRichTextCtrl(this);
 133
 134     if (style & wxTE_READONLY)
 135         SetEditable(false);
 136
 137     wxTextAttrEx attributes;
 138     attributes.SetFont(GetFont());
 139     attributes.SetTextColour(*wxBLACK);
 140     attributes.SetBackgroundColour(*wxWHITE);
 141     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 142     attributes.SetLineSpacing(10);
 143     attributes.SetParagraphSpacingAfter(10);
 144     attributes.SetParagraphSpacingBefore(0);
 145
 146     SetBasicStyle(attributes);
 147
 148     // The default attributes will be merged with base attributes, so
 149     // can be empty to begin with
 150     wxTextAttrEx defaultAttributes;
 151     SetDefaultStyle(defaultAttributes);
 152
 153     SetBackgroundColour(*wxWHITE);
 154     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 155
 156     // Tell the sizers to use the given or best size
 157     SetBestFittingSize(size);
 158
 159 #if wxRICHTEXT_BUFFERED_PAINTING
 160     // Create a buffer
 161     RecreateBuffer(size);
 162 #endif
 163
 164     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 165     m_urlCursor = wxCursor(wxCURSOR_HAND);
 166
 167     SetCursor(m_textCursor);
 168
 169     if (!value.IsEmpty())
 170         SetValue(value);
 171
 172     GetBuffer().AddEventHandler(this);
 173
 174     return true;
 175 }
 176
 177 wxRichTextCtrl::~wxRichTextCtrl()
 178 {
 179     GetBuffer().RemoveEventHandler(this);
 180
 181     delete m_contextMenu;
 182 }
 183
 184 /// Member initialisation
 185 void wxRichTextCtrl::Init()
 186 {
 187     m_freezeCount = 0;
 188     m_contextMenu = NULL;
 189     m_caret = NULL;
 190     m_caretPosition = -1;
 191     m_selectionRange.SetRange(-2, -2);
 192     m_selectionAnchor = -2;
 193     m_editable = true;
 194     m_caretAtLineStart = false;
 195     m_dragging = false;
 196     m_fullLayoutRequired = false;
 197     m_fullLayoutTime = 0;
 198     m_fullLayoutSavedPosition = 0;
 199     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 200     m_caretPositionForDefaultStyle = -2;
 201 }
 202
 203 /// Call Freeze to prevent refresh
 204 void wxRichTextCtrl::Freeze()
 205 {
 206     m_freezeCount ++;
 207 }
 208
 209 /// Call Thaw to refresh
 210 void wxRichTextCtrl::Thaw()
 211 {
 212     m_freezeCount --;
 213
 214     if (m_freezeCount == 0)
 215     {
 216         SetupScrollbars();
 217         Refresh(false);
 218     }
 219 }
 220
 221 /// Clear all text
 222 void wxRichTextCtrl::Clear()
 223 {
 224     m_buffer.ResetAndClearCommands();
 225     m_buffer.SetDirty(true);
 226     m_caretPosition = -1;
 227     m_caretPositionForDefaultStyle = -2;
 228     m_caretAtLineStart = false;
 229     m_selectionRange.SetRange(-2, -2);
 230
 231     SetScrollbars(0, 0, 0, 0, 0, 0);
 232
 233     if (m_freezeCount == 0)
 234     {
 235         SetupScrollbars();
 236         Refresh(false);
 237     }
 238     SendTextUpdatedEvent();
 239 }
 240
 241 /// Painting
 242 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 243 {
 244     if (GetCaret())
 245         GetCaret()->Hide();
 246
 247     {
 248 #if wxRICHTEXT_BUFFERED_PAINTING
 249         wxBufferedPaintDC dc(this, m_bufferBitmap);
 250 #else
 251         wxPaintDC dc(this);
 252 #endif
 253         PrepareDC(dc);
 254
 255         if (m_freezeCount > 0)
 256             return;
 257
 258         dc.SetFont(GetFont());
 259
 260         // Paint the background
 261         PaintBackground(dc);
 262
 263         wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 264         wxRect availableSpace(GetClientSize());
 265         if (GetBuffer().GetDirty())
 266         {
 267             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 268             GetBuffer().SetDirty(false);
 269             SetupScrollbars();
 270         }
 271
 272         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 273     }
 274
 275     if (GetCaret())
 276         GetCaret()->Show();
 277
 278     PositionCaret();
 279 }
 280
 281 // Empty implementation, to prevent flicker
 282 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 283 {
 284 }
 285
 286 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 287 {
 288     wxCaret* caret = new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16);
 289     SetCaret(caret);
 290     caret->Show();
 291     PositionCaret();
 292
 293     if (!IsFrozen())
 294         Refresh(false);
 295 }
 296
 297 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 298 {
 299     SetCaret(NULL);
 300
 301     if (!IsFrozen())
 302         Refresh(false);
 303 }
 304
 305 /// Left-click
 306 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 307 {
 308     SetFocus();
 309
 310     wxClientDC dc(this);
 311     PrepareDC(dc);
 312     dc.SetFont(GetFont());
 313
 314     long position = 0;
 315     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 316
 317     if (hit != wxRICHTEXT_HITTEST_NONE)
 318     {
 319         m_dragStart = event.GetLogicalPosition(dc);
 320         m_dragging = true;
 321         CaptureMouse();
 322
 323         SelectNone();
 324
 325         bool caretAtLineStart = false;
 326
 327         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 328         {
 329             // If we're at the start of a line (but not first in para)
 330             // then we should keep the caret showing at the start of the line
 331             // by showing the m_caretAtLineStart flag.
 332             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 333             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 334
 335             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 336                 caretAtLineStart = true;
 337             position --;
 338         }
 339
 340         MoveCaret(position, caretAtLineStart);
 341         SetDefaultStyleToCursorStyle();
 342     }
 343
 344     event.Skip();
 345 }
 346
 347 /// Left-up
 348 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 349 {
 350     if (m_dragging)
 351     {
 352         m_dragging = false;
 353         if (GetCapture() == this)
 354             ReleaseMouse();
 355
 356         // See if we clicked on a URL
 357         wxClientDC dc(this);
 358         PrepareDC(dc);
 359         dc.SetFont(GetFont());
 360
 361         long position = 0;
 362         wxPoint logicalPt = event.GetLogicalPosition(dc);
 363         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 364
 365         if (hit != wxRICHTEXT_HITTEST_NONE)
 366         {
 367             wxTextAttrEx attr;
 368             if (GetStyle(position, attr))
 369             {
 370                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 371                 {
 372                     wxString urlTarget = attr.GetURL();
 373                     if (!urlTarget.IsEmpty())
 374                     {
 375                         wxMouseEvent mouseEvent(event);
 376
 377                         long startPos = 0, endPos = 0;
 378                         wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 379                         if (obj)
 380                         {
 381                             startPos = obj->GetRange().GetStart();
 382                             endPos = obj->GetRange().GetEnd();
 383                         }
 384
 385                         wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 386                         InitCommandEvent(urlEvent);
 387
 388                         urlEvent.SetString(urlTarget);
 389
 390                         GetEventHandler()->ProcessEvent(urlEvent);
 391                     }
 392                 }
 393             }
 394         }
 395     }
 396 }
 397
 398 /// Left-click
 399 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 400 {
 401     wxClientDC dc(this);
 402     PrepareDC(dc);
 403     dc.SetFont(GetFont());
 404
 405     long position = 0;
 406     wxPoint logicalPt = event.GetLogicalPosition(dc);
 407     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 408
 409     // See if we need to change the cursor
 410
 411     {
 412         if (hit != wxRICHTEXT_HITTEST_NONE)
 413         {
 414             wxTextAttrEx attr;
 415             if (GetStyle(position, attr))
 416             {
 417                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 418                 {
 419                     if (GetCursor() != m_urlCursor)
 420                         SetCursor(m_urlCursor);
 421                 }
 422                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 423                 {
 424                     if (GetCursor() != m_textCursor)
 425                         SetCursor(m_textCursor);
 426                 }
 427             }
 428         }
 429     }
 430
 431     if (!event.Dragging())
 432     {
 433         event.Skip();
 434         return;
 435     }
 436
 437     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 438     {
 439         // TODO: test closeness
 440
 441         bool caretAtLineStart = false;
 442
 443         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 444         {
 445             // If we're at the start of a line (but not first in para)
 446             // then we should keep the caret showing at the start of the line
 447             // by showing the m_caretAtLineStart flag.
 448             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 449             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 450
 451             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 452                 caretAtLineStart = true;
 453             position --;
 454         }
 455
 456         if (m_caretPosition != position)
 457         {
 458             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 459
 460             MoveCaret(position, caretAtLineStart);
 461             SetDefaultStyleToCursorStyle();
 462
 463             if (extendSel)
 464                 Refresh(false);
 465         }
 466     }
 467 }
 468
 469 /// Right-click
 470 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 471 {
 472     SetFocus();
 473     event.Skip();
 474 }
 475
 476 /// Left-double-click
 477 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& event)
 478 {
 479     SelectWord(GetCaretPosition()+1);
 480     event.Skip();
 481 }
 482
 483 /// Middle-click
 484 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 485 {
 486     event.Skip();
 487 }
 488
 489 /// Key press
 490 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 491 {
 492     int flags = 0;
 493     if (event.CmdDown())
 494         flags |= wxRICHTEXT_CTRL_DOWN;
 495     if (event.ShiftDown())
 496         flags |= wxRICHTEXT_SHIFT_DOWN;
 497     if (event.AltDown())
 498         flags |= wxRICHTEXT_ALT_DOWN;
 499
 500     if (event.GetKeyCode() == WXK_LEFT ||
 501         event.GetKeyCode() == WXK_RIGHT ||
 502         event.GetKeyCode() == WXK_UP ||
 503         event.GetKeyCode() == WXK_DOWN ||
 504         event.GetKeyCode() == WXK_HOME ||
 505         event.GetKeyCode() == WXK_PAGEUP ||
 506         event.GetKeyCode() == WXK_PAGEDOWN ||
 507         event.GetKeyCode() == WXK_END ||
 508
 509         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 510         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 511         event.GetKeyCode() == WXK_NUMPAD_UP ||
 512         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 513         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 514         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 515         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 516         event.GetKeyCode() == WXK_NUMPAD_END)
 517     {
 518         KeyboardNavigate(event.GetKeyCode(), flags);
 519         return;
 520     }
 521
 522     // all the other keys modify the controls contents which shouldn't be
 523     // possible if we're read-only
 524     if ( !IsEditable() )
 525     {
 526         event.Skip();
 527         return;
 528     }
 529
 530     if (event.GetKeyCode() == WXK_RETURN)
 531     {
 532         BeginBatchUndo(_("Insert Text"));
 533
 534         long newPos = m_caretPosition;
 535
 536         DeleteSelectedContent(& newPos);
 537
 538         GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 539         EndBatchUndo();
 540         SetDefaultStyleToCursorStyle();
 541
 542         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 543
 544         wxRichTextEvent cmdEvent(
 545             wxEVT_COMMAND_RICHTEXT_RETURN,
 546             GetId());
 547         cmdEvent.SetEventObject(this);
 548         cmdEvent.SetFlags(flags);
 549         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 550         {
 551             // Generate conventional event
 552             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 553             InitCommandEvent(textEvent);
 554
 555             GetEventHandler()->ProcessEvent(textEvent);
 556         }
 557         Update();
 558     }
 559     else if (event.GetKeyCode() == WXK_BACK)
 560     {
 561         BeginBatchUndo(_("Delete Text"));
 562
 563         // Submit range in character positions, which are greater than caret positions,
 564         // so subtract 1 for deleted character and add 1 for conversion to character position.
 565         if (m_caretPosition > -1 && !HasSelection())
 566         {
 567             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition),
 568                 m_caretPosition,   // Current caret position
 569                 m_caretPosition-1, // New caret position
 570                 this);
 571         }
 572         else
 573             DeleteSelectedContent();
 574
 575         EndBatchUndo();
 576
 577         if (GetLastPosition() == -1)
 578         {
 579             GetBuffer().Reset();
 580
 581             m_caretPosition = -1;
 582             PositionCaret();
 583             SetDefaultStyleToCursorStyle();
 584         }
 585
 586         ScrollIntoView(m_caretPosition, WXK_LEFT);
 587         Update();
 588     }
 589     else if (event.GetKeyCode() == WXK_DELETE)
 590     {
 591         BeginBatchUndo(_("Delete Text"));
 592
 593         // Submit range in character positions, which are greater than caret positions,
 594         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 595         {
 596             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1),
 597                 m_caretPosition,   // Current caret position
 598                 m_caretPosition+1, // New caret position
 599                 this);
 600         }
 601         else
 602             DeleteSelectedContent();
 603
 604         EndBatchUndo();
 605
 606         if (GetLastPosition() == -1)
 607         {
 608             GetBuffer().Reset();
 609
 610             m_caretPosition = -1;
 611             PositionCaret();
 612             SetDefaultStyleToCursorStyle();
 613         }
 614         Update();
 615     }
 616     else
 617     {
 618         long keycode = event.GetKeyCode();
 619         switch ( keycode )
 620         {
 621             case WXK_ESCAPE:
 622             // case WXK_SPACE:
 623             case WXK_DELETE:
 624             case WXK_START:
 625             case WXK_LBUTTON:
 626             case WXK_RBUTTON:
 627             case WXK_CANCEL:
 628             case WXK_MBUTTON:
 629             case WXK_CLEAR:
 630             case WXK_SHIFT:
 631             case WXK_ALT:
 632             case WXK_CONTROL:
 633             case WXK_MENU:
 634             case WXK_PAUSE:
 635             case WXK_CAPITAL:
 636             case WXK_END:
 637             case WXK_HOME:
 638             case WXK_LEFT:
 639             case WXK_UP:
 640             case WXK_RIGHT:
 641             case WXK_DOWN:
 642             case WXK_SELECT:
 643             case WXK_PRINT:
 644             case WXK_EXECUTE:
 645             case WXK_SNAPSHOT:
 646             case WXK_INSERT:
 647             case WXK_HELP:
 648             case WXK_NUMPAD0:
 649             case WXK_NUMPAD1:
 650             case WXK_NUMPAD2:
 651             case WXK_NUMPAD3:
 652             case WXK_NUMPAD4:
 653             case WXK_NUMPAD5:
 654             case WXK_NUMPAD6:
 655             case WXK_NUMPAD7:
 656             case WXK_NUMPAD8:
 657             case WXK_NUMPAD9:
 658             case WXK_MULTIPLY:
 659             case WXK_ADD:
 660             case WXK_SEPARATOR:
 661             case WXK_SUBTRACT:
 662             case WXK_DECIMAL:
 663             case WXK_DIVIDE:
 664             case WXK_F1:
 665             case WXK_F2:
 666             case WXK_F3:
 667             case WXK_F4:
 668             case WXK_F5:
 669             case WXK_F6:
 670             case WXK_F7:
 671             case WXK_F8:
 672             case WXK_F9:
 673             case WXK_F10:
 674             case WXK_F11:
 675             case WXK_F12:
 676             case WXK_F13:
 677             case WXK_F14:
 678             case WXK_F15:
 679             case WXK_F16:
 680             case WXK_F17:
 681             case WXK_F18:
 682             case WXK_F19:
 683             case WXK_F20:
 684             case WXK_F21:
 685             case WXK_F22:
 686             case WXK_F23:
 687             case WXK_F24:
 688             case WXK_NUMLOCK:
 689             case WXK_SCROLL:
 690             case WXK_PAGEUP:
 691             case WXK_PAGEDOWN:
 692             case WXK_NUMPAD_SPACE:
 693             case WXK_NUMPAD_TAB:
 694             case WXK_NUMPAD_ENTER:
 695             case WXK_NUMPAD_F1:
 696             case WXK_NUMPAD_F2:
 697             case WXK_NUMPAD_F3:
 698             case WXK_NUMPAD_F4:
 699             case WXK_NUMPAD_HOME:
 700             case WXK_NUMPAD_LEFT:
 701             case WXK_NUMPAD_UP:
 702             case WXK_NUMPAD_RIGHT:
 703             case WXK_NUMPAD_DOWN:
 704             case WXK_NUMPAD_PAGEUP:
 705             case WXK_NUMPAD_PAGEDOWN:
 706             case WXK_NUMPAD_END:
 707             case WXK_NUMPAD_BEGIN:
 708             case WXK_NUMPAD_INSERT:
 709             case WXK_NUMPAD_DELETE:
 710             case WXK_NUMPAD_EQUAL:
 711             case WXK_NUMPAD_MULTIPLY:
 712             case WXK_NUMPAD_ADD:
 713             case WXK_NUMPAD_SEPARATOR:
 714             case WXK_NUMPAD_SUBTRACT:
 715             case WXK_NUMPAD_DECIMAL:
 716             {
 717                 event.Skip();
 718                 return;
 719             }
 720
 721             default:
 722             {
 723                 if (event.CmdDown() || event.AltDown())
 724                 {
 725                     event.Skip();
 726                     return;
 727                 }
 728
 729                 if (keycode == wxT('\t'))
 730                 {
 731                     // See if we need to promote or demote the selection or paragraph at the cursor
 732                     // position, instead of inserting a tab.
 733                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 734                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 735                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 736                     {
 737                         wxRichTextRange range;
 738                         if (HasSelection())
 739                             range = GetSelectionRange();
 740                         else
 741                             range = para->GetRange().FromInternal();
 742
 743                         int promoteBy = event.ShiftDown() ? 1 : -1;
 744
 745                         PromoteList(promoteBy, range, NULL);
 746
 747                         return;
 748                     }
 749                 }
 750
 751                 BeginBatchUndo(_("Insert Text"));
 752
 753                 long newPos = m_caretPosition;
 754                 DeleteSelectedContent(& newPos);
 755
 756                 wxString str = (wxChar) event.GetKeyCode();
 757                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 758
 759                 EndBatchUndo();
 760
 761                 SetDefaultStyleToCursorStyle();
 762                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 763                 Update();
 764             }
 765         }
 766     }
 767 }
 768
 769 /// Delete content if there is a selection, e.g. when pressing a key.
 770 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 771 {
 772     if (HasSelection())
 773     {
 774         long pos = m_selectionRange.GetStart();
 775         GetBuffer().DeleteRangeWithUndo(m_selectionRange,
 776             m_caretPosition,       // Current caret position
 777             pos,    // New caret position
 778             this);
 779         m_selectionRange.SetRange(-2, -2);
 780
 781         if (newPos)
 782             *newPos = pos-1;
 783         return true;
 784     }
 785     else
 786         return false;
 787 }
 788
 789 /// Keyboard navigation
 790
 791 /*
 792
 793 Left:       left one character
 794 Right:      right one character
 795 Up:         up one line
 796 Down:       down one line
 797 Ctrl-Left:  left one word
 798 Ctrl-Right: right one word
 799 Ctrl-Up:    previous paragraph start
 800 Ctrl-Down:  next start of paragraph
 801 Home:       start of line
 802 End:        end of line
 803 Ctrl-Home:  start of document
 804 Ctrl-End:   end of document
 805 Page-Up:    Up a screen
 806 Page-Down:  Down a screen
 807
 808 Maybe:
 809
 810 Ctrl-Alt-PgUp: Start of window
 811 Ctrl-Alt-PgDn: End of window
 812 F8:         Start selection mode
 813 Esc:        End selection mode
 814
 815 Adding Shift does the above but starts/extends selection.
 816
 817
 818  */
 819
 820 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 821 {
 822     bool success = false;
 823
 824     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 825     {
 826         if (flags & wxRICHTEXT_CTRL_DOWN)
 827             success = WordRight(1, flags);
 828         else
 829             success = MoveRight(1, flags);
 830     }
 831     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 832     {
 833         if (flags & wxRICHTEXT_CTRL_DOWN)
 834             success = WordLeft(1, flags);
 835         else
 836             success = MoveLeft(1, flags);
 837     }
 838     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 839     {
 840         if (flags & wxRICHTEXT_CTRL_DOWN)
 841             success = MoveToParagraphStart(flags);
 842         else
 843             success = MoveUp(1, flags);
 844     }
 845     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 846     {
 847         if (flags & wxRICHTEXT_CTRL_DOWN)
 848             success = MoveToParagraphEnd(flags);
 849         else
 850             success = MoveDown(1, flags);
 851     }
 852     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 853     {
 854         success = PageUp(1, flags);
 855     }
 856     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 857     {
 858         success = PageDown(1, flags);
 859     }
 860     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 861     {
 862         if (flags & wxRICHTEXT_CTRL_DOWN)
 863             success = MoveHome(flags);
 864         else
 865             success = MoveToLineStart(flags);
 866     }
 867     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 868     {
 869         if (flags & wxRICHTEXT_CTRL_DOWN)
 870             success = MoveEnd(flags);
 871         else
 872             success = MoveToLineEnd(flags);
 873     }
 874
 875     if (success)
 876     {
 877         ScrollIntoView(m_caretPosition, keyCode);
 878         SetDefaultStyleToCursorStyle();
 879     }
 880
 881     return success;
 882 }
 883
 884 /// Extend the selection. Selections are in caret positions.
 885 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 886 {
 887     if (flags & wxRICHTEXT_SHIFT_DOWN)
 888     {
 889         // If not currently selecting, start selecting
 890         if (m_selectionRange.GetStart() == -2)
 891         {
 892             m_selectionAnchor = oldPos;
 893
 894             if (oldPos > newPos)
 895                 m_selectionRange.SetRange(newPos+1, oldPos);
 896             else
 897                 m_selectionRange.SetRange(oldPos+1, newPos);
 898         }
 899         else
 900         {
 901             // Always ensure that the selection range start is greater than
 902             // the end.
 903             if (newPos > m_selectionAnchor)
 904                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
 905             else
 906                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
 907         }
 908
 909         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
 910         {
 911             wxLogDebug(wxT("Strange selection range"));
 912         }
 913
 914         return true;
 915     }
 916     else
 917         return false;
 918 }
 919
 920 /// Scroll into view, returning true if we scrolled.
 921 /// This takes a _caret_ position.
 922 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
 923 {
 924     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
 925
 926     if (!line)
 927         return false;
 928
 929     int ppuX, ppuY;
 930     GetScrollPixelsPerUnit(& ppuX, & ppuY);
 931
 932     int startXUnits, startYUnits;
 933     GetViewStart(& startXUnits, & startYUnits);
 934     int startY = startYUnits * ppuY;
 935
 936     int sx = 0, sy = 0;
 937     GetVirtualSize(& sx, & sy);
 938     int sxUnits = 0;
 939     int syUnits = 0;
 940     if (ppuY != 0)
 941         syUnits = sy/ppuY;
 942
 943     wxRect rect = line->GetRect();
 944
 945     bool scrolled = false;
 946
 947     wxSize clientSize = GetClientSize();
 948
 949     // Going down
 950     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
 951         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_DOWN ||
 952         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
 953         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 954     {
 955         if ((rect.y + rect.height) > (clientSize.y + startY))
 956         {
 957             // Make it scroll so this item is at the bottom
 958             // of the window
 959             int y = rect.y - (clientSize.y - rect.height);
 960             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
 961
 962             // If we're still off the screen, scroll another line down
 963             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
 964                 yUnits ++;
 965
 966             if (startYUnits != yUnits)
 967             {
 968                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
 969                 scrolled = true;
 970             }
 971         }
 972         else if (rect.y < startY)
 973         {
 974             // Make it scroll so this item is at the top
 975             // of the window
 976             int y = rect.y ;
 977             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
 978
 979             if (startYUnits != yUnits)
 980             {
 981                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
 982                 scrolled = true;
 983             }
 984         }
 985     }
 986     // Going up
 987     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
 988              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
 989              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
 990              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
 991     {
 992         if (rect.y < startY)
 993         {
 994             // Make it scroll so this item is at the top
 995             // of the window
 996             int y = rect.y ;
 997             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
 998
 999             if (startYUnits != yUnits)
1000             {
1001                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1002                 scrolled = true;
1003             }
1004         }
1005         else if ((rect.y + rect.height) > (clientSize.y + startY))
1006         {
1007             // Make it scroll so this item is at the bottom
1008             // of the window
1009             int y = rect.y - (clientSize.y - rect.height);
1010             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1011
1012             // If we're still off the screen, scroll another line down
1013             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1014                 yUnits ++;
1015
1016             if (startYUnits != yUnits)
1017             {
1018                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1019                 scrolled = true;
1020             }
1021         }
1022     }
1023     PositionCaret();
1024
1025     return scrolled;
1026 }
1027
1028 /// Is the given position visible on the screen?
1029 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1030 {
1031     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1032
1033     if (!line)
1034         return false;
1035
1036     int ppuX, ppuY;
1037     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1038
1039     int startX, startY;
1040     GetViewStart(& startX, & startY);
1041     startX = 0;
1042     startY = startY * ppuY;
1043
1044     int sx = 0, sy = 0;
1045     GetVirtualSize(& sx, & sy);
1046     sx = 0;
1047     if (ppuY != 0)
1048         sy = sy/ppuY;
1049
1050     wxRect rect = line->GetRect();
1051
1052     wxSize clientSize = GetClientSize();
1053
1054     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1055 }
1056
1057 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1058 {
1059     m_caretPosition = position;
1060     m_caretAtLineStart = showAtLineStart;
1061 }
1062
1063 /// Move caret one visual step forward: this may mean setting a flag
1064 /// and keeping the same position if we're going from the end of one line
1065 /// to the start of the next, which may be the exact same caret position.
1066 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1067 {
1068     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1069
1070     // Only do the check if we're not at the end of the paragraph (where things work OK
1071     // anyway)
1072     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1073     {
1074         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1075
1076         if (line)
1077         {
1078             wxRichTextRange lineRange = line->GetAbsoluteRange();
1079
1080             // We're at the end of a line. See whether we need to
1081             // stay at the same actual caret position but change visual
1082             // position, or not.
1083             if (oldPosition == lineRange.GetEnd())
1084             {
1085                 if (m_caretAtLineStart)
1086                 {
1087                     // We're already at the start of the line, so actually move on now.
1088                     m_caretPosition = oldPosition + 1;
1089                     m_caretAtLineStart = false;
1090                 }
1091                 else
1092                 {
1093                     // We're showing at the end of the line, so keep to
1094                     // the same position but indicate that we're to show
1095                     // at the start of the next line.
1096                     m_caretPosition = oldPosition;
1097                     m_caretAtLineStart = true;
1098                 }
1099                 SetDefaultStyleToCursorStyle();
1100                 return;
1101             }
1102         }
1103     }
1104     m_caretPosition ++;
1105     SetDefaultStyleToCursorStyle();
1106 }
1107
1108 /// Move caret one visual step backward: this may mean setting a flag
1109 /// and keeping the same position if we're going from the end of one line
1110 /// to the start of the next, which may be the exact same caret position.
1111 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1112 {
1113     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1114
1115     // Only do the check if we're not at the start of the paragraph (where things work OK
1116     // anyway)
1117     if (para && (oldPosition != para->GetRange().GetStart()))
1118     {
1119         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1120
1121         if (line)
1122         {
1123             wxRichTextRange lineRange = line->GetAbsoluteRange();
1124
1125             // We're at the start of a line. See whether we need to
1126             // stay at the same actual caret position but change visual
1127             // position, or not.
1128             if (oldPosition == lineRange.GetStart())
1129             {
1130                 m_caretPosition = oldPosition-1;
1131                 m_caretAtLineStart = true;
1132                 return;
1133             }
1134             else if (oldPosition == lineRange.GetEnd())
1135             {
1136                 if (m_caretAtLineStart)
1137                 {
1138                     // We're at the start of the line, so keep the same caret position
1139                     // but clear the start-of-line flag.
1140                     m_caretPosition = oldPosition;
1141                     m_caretAtLineStart = false;
1142                 }
1143                 else
1144                 {
1145                     // We're showing at the end of the line, so go back
1146                     // to the previous character position.
1147                     m_caretPosition = oldPosition - 1;
1148                 }
1149                 SetDefaultStyleToCursorStyle();
1150                 return;
1151             }
1152         }
1153     }
1154     m_caretPosition --;
1155     SetDefaultStyleToCursorStyle();
1156 }
1157
1158 /// Move right
1159 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1160 {
1161     long endPos = GetBuffer().GetRange().GetEnd();
1162
1163     if (m_caretPosition + noPositions < endPos)
1164     {
1165         long oldPos = m_caretPosition;
1166         long newPos = m_caretPosition + noPositions;
1167
1168         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1169         if (!extendSel)
1170             SelectNone();
1171
1172         // Determine by looking at oldPos and m_caretPosition whether
1173         // we moved from the end of a line to the start of the next line, in which case
1174         // we want to adjust the caret position such that it is positioned at the
1175         // start of the next line, rather than jumping past the first character of the
1176         // line.
1177         if (noPositions == 1 && !extendSel)
1178             MoveCaretForward(oldPos);
1179         else
1180             SetCaretPosition(newPos);
1181
1182         PositionCaret();
1183         SetDefaultStyleToCursorStyle();
1184
1185         if (extendSel)
1186             Refresh(false);
1187         return true;
1188     }
1189     else
1190         return false;
1191 }
1192
1193 /// Move left
1194 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1195 {
1196     long startPos = -1;
1197
1198     if (m_caretPosition > startPos - noPositions + 1)
1199     {
1200         long oldPos = m_caretPosition;
1201         long newPos = m_caretPosition - noPositions;
1202         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1203         if (!extendSel)
1204             SelectNone();
1205
1206         if (noPositions == 1 && !extendSel)
1207             MoveCaretBack(oldPos);
1208         else
1209             SetCaretPosition(newPos);
1210
1211         PositionCaret();
1212         SetDefaultStyleToCursorStyle();
1213
1214         if (extendSel)
1215             Refresh(false);
1216         return true;
1217     }
1218     else
1219         return false;
1220 }
1221
1222 /// Move up
1223 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1224 {
1225     return MoveDown(- noLines, flags);
1226 }
1227
1228 /// Move up
1229 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1230 {
1231     if (!GetCaret())
1232         return false;
1233
1234     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1235     wxPoint pt = GetCaret()->GetPosition();
1236     long newLine = lineNumber + noLines;
1237
1238     if (lineNumber != -1)
1239     {
1240         if (noLines > 0)
1241         {
1242             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1243
1244             if (newLine > lastLine)
1245                 return false;
1246         }
1247         else
1248         {
1249             if (newLine < 0)
1250                 return false;
1251         }
1252     }
1253
1254     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1255     if (lineObj)
1256     {
1257         pt.y = lineObj->GetAbsolutePosition().y + 2;
1258     }
1259     else
1260         return false;
1261
1262     long newPos = 0;
1263     wxClientDC dc(this);
1264     PrepareDC(dc);
1265     dc.SetFont(GetFont());
1266
1267     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1268
1269     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1270     {
1271         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1272         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1273         // so we view the caret at the start of the line.
1274         bool caretLineStart = false;
1275         if (hitTest == wxRICHTEXT_HITTEST_BEFORE)
1276         {
1277             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1278             wxRichTextRange lineRange;
1279             if (thisLine)
1280                 lineRange = thisLine->GetAbsoluteRange();
1281
1282             if (thisLine && (newPos-1) == lineRange.GetEnd())
1283             {
1284                 newPos --;
1285                 caretLineStart = true;
1286             }
1287             else
1288             {
1289                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1290                 if (para && para->GetRange().GetStart() == newPos)
1291                     newPos --;
1292             }
1293         }
1294
1295         long newSelEnd = newPos;
1296
1297         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1298         if (!extendSel)
1299             SelectNone();
1300
1301         SetCaretPosition(newPos, caretLineStart);
1302         PositionCaret();
1303         SetDefaultStyleToCursorStyle();
1304
1305         if (extendSel)
1306             Refresh(false);
1307         return true;
1308     }
1309
1310     return false;
1311 }
1312
1313 /// Move to the end of the paragraph
1314 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1315 {
1316     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1317     if (para)
1318     {
1319         long newPos = para->GetRange().GetEnd() - 1;
1320         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1321         if (!extendSel)
1322             SelectNone();
1323
1324         SetCaretPosition(newPos);
1325         PositionCaret();
1326         SetDefaultStyleToCursorStyle();
1327
1328         if (extendSel)
1329             Refresh(false);
1330         return true;
1331     }
1332
1333     return false;
1334 }
1335
1336 /// Move to the start of the paragraph
1337 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1338 {
1339     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1340     if (para)
1341     {
1342         long newPos = para->GetRange().GetStart() - 1;
1343         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1344         if (!extendSel)
1345             SelectNone();
1346
1347         SetCaretPosition(newPos);
1348         PositionCaret();
1349         SetDefaultStyleToCursorStyle();
1350
1351         if (extendSel)
1352             Refresh(false);
1353         return true;
1354     }
1355
1356     return false;
1357 }
1358
1359 /// Move to the end of the line
1360 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1361 {
1362     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1363
1364     if (line)
1365     {
1366         wxRichTextRange lineRange = line->GetAbsoluteRange();
1367         long newPos = lineRange.GetEnd();
1368         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1369         if (!extendSel)
1370             SelectNone();
1371
1372         SetCaretPosition(newPos);
1373         PositionCaret();
1374         SetDefaultStyleToCursorStyle();
1375
1376         if (extendSel)
1377             Refresh(false);
1378         return true;
1379     }
1380
1381     return false;
1382 }
1383
1384 /// Move to the start of the line
1385 bool wxRichTextCtrl::MoveToLineStart(int flags)
1386 {
1387     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1388     if (line)
1389     {
1390         wxRichTextRange lineRange = line->GetAbsoluteRange();
1391         long newPos = lineRange.GetStart()-1;
1392
1393         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1394         if (!extendSel)
1395             SelectNone();
1396
1397         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1398
1399         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1400         PositionCaret();
1401         SetDefaultStyleToCursorStyle();
1402
1403         if (extendSel)
1404             Refresh(false);
1405         return true;
1406     }
1407
1408     return false;
1409 }
1410
1411 /// Move to the start of the buffer
1412 bool wxRichTextCtrl::MoveHome(int flags)
1413 {
1414     if (m_caretPosition != -1)
1415     {
1416         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1417         if (!extendSel)
1418             SelectNone();
1419
1420         SetCaretPosition(-1);
1421         PositionCaret();
1422         SetDefaultStyleToCursorStyle();
1423
1424         if (extendSel)
1425             Refresh(false);
1426         return true;
1427     }
1428     else
1429         return false;
1430 }
1431
1432 /// Move to the end of the buffer
1433 bool wxRichTextCtrl::MoveEnd(int flags)
1434 {
1435     long endPos = GetBuffer().GetRange().GetEnd()-1;
1436
1437     if (m_caretPosition != endPos)
1438     {
1439         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1440         if (!extendSel)
1441             SelectNone();
1442
1443         SetCaretPosition(endPos);
1444         PositionCaret();
1445         SetDefaultStyleToCursorStyle();
1446
1447         if (extendSel)
1448             Refresh(false);
1449         return true;
1450     }
1451     else
1452         return false;
1453 }
1454
1455 /// Move noPages pages up
1456 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1457 {
1458     return PageDown(- noPages, flags);
1459 }
1460
1461 /// Move noPages pages down
1462 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1463 {
1464     // Calculate which line occurs noPages * screen height further down.
1465     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1466     if (line)
1467     {
1468         wxSize clientSize = GetClientSize();
1469         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1470
1471         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1472         if (newLine)
1473         {
1474             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1475             long pos = lineRange.GetStart()-1;
1476             if (pos != m_caretPosition)
1477             {
1478                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1479
1480                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1481                 if (!extendSel)
1482                     SelectNone();
1483
1484                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1485                 PositionCaret();
1486                 SetDefaultStyleToCursorStyle();
1487
1488                 if (extendSel)
1489                     Refresh(false);
1490                 return true;
1491             }
1492         }
1493     }
1494
1495     return false;
1496 }
1497
1498 // Finds the caret position for the next word
1499 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1500 {
1501     long endPos = GetBuffer().GetRange().GetEnd();
1502
1503     if (direction > 0)
1504     {
1505         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1506
1507         // First skip current text to space
1508         while (i < endPos && i > -1)
1509         {
1510             // i is in character, not caret positions
1511             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1512             if (text != wxT(" ") && !text.empty())
1513                 i += direction;
1514             else
1515             {
1516                 break;
1517             }
1518         }
1519         while (i < endPos && i > -1)
1520         {
1521             // i is in character, not caret positions
1522             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1523             if (text.empty()) // End of paragraph, or maybe an image
1524                 return wxMax(-1, i - 1);
1525             else if (text == wxT(" ") || text.empty())
1526                 i += direction;
1527             else
1528             {
1529                 // Convert to caret position
1530                 return wxMax(-1, i - 1);
1531             }
1532         }
1533         if (i >= endPos)
1534             return endPos-1;
1535         return i-1;
1536     }
1537     else
1538     {
1539         long i = m_caretPosition;
1540
1541         // First skip white space
1542         while (i < endPos && i > -1)
1543         {
1544             // i is in character, not caret positions
1545             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1546             if (text.empty()) // End of paragraph, or maybe an image
1547                 break;
1548             else if (text == wxT(" ") || text.empty())
1549                 i += direction;
1550             else
1551                 break;
1552         }
1553         // Next skip current text to space
1554         while (i < endPos && i > -1)
1555         {
1556             // i is in character, not caret positions
1557             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1558             if (text != wxT(" ") /* && !text.empty() */)
1559                 i += direction;
1560             else
1561             {
1562                 return i;
1563             }
1564         }
1565         if (i < -1)
1566             return -1;
1567         return i;
1568     }
1569 }
1570
1571 /// Move n words left
1572 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1573 {
1574     long pos = FindNextWordPosition(-1);
1575     if (pos != m_caretPosition)
1576     {
1577         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1578
1579         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1580         if (!extendSel)
1581             SelectNone();
1582
1583         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1584         PositionCaret();
1585         SetDefaultStyleToCursorStyle();
1586
1587         if (extendSel)
1588             Refresh(false);
1589         return true;
1590     }
1591
1592     return false;
1593 }
1594
1595 /// Move n words right
1596 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1597 {
1598     long pos = FindNextWordPosition(1);
1599     if (pos != m_caretPosition)
1600     {
1601         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1602
1603         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1604         if (!extendSel)
1605             SelectNone();
1606
1607         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1608         PositionCaret();
1609         SetDefaultStyleToCursorStyle();
1610
1611         if (extendSel)
1612             Refresh(false);
1613         return true;
1614     }
1615
1616     return false;
1617 }
1618
1619 /// Sizing
1620 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1621 {
1622     // Only do sizing optimization for large buffers
1623     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1624     {
1625         m_fullLayoutRequired = true;
1626         m_fullLayoutTime = wxGetLocalTimeMillis();
1627         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1628         LayoutContent(true /* onlyVisibleRect */);
1629     }
1630     else
1631         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1632
1633 #if wxRICHTEXT_BUFFERED_PAINTING
1634     RecreateBuffer();
1635 #endif
1636
1637     event.Skip();
1638 }
1639
1640
1641 /// Idle-time processing
1642 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1643 {
1644     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1645
1646     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1647     {
1648         m_fullLayoutRequired = false;
1649         m_fullLayoutTime = 0;
1650         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1651         ShowPosition(m_fullLayoutSavedPosition);
1652         Refresh(false);
1653     }
1654
1655     if (m_caretPositionForDefaultStyle != -2)
1656     {
1657         // If the caret position has changed, no longer reflect the default style
1658         // in the UI.
1659         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1660             m_caretPositionForDefaultStyle = -2;
1661     }
1662
1663     event.Skip();
1664 }
1665
1666 /// Scrolling
1667 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1668 {
1669     // Not used
1670     event.Skip();
1671 }
1672
1673 /// Set up scrollbars, e.g. after a resize
1674 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1675 {
1676     if (m_freezeCount)
1677         return;
1678
1679     if (GetBuffer().IsEmpty())
1680     {
1681         SetScrollbars(0, 0, 0, 0, 0, 0);
1682         return;
1683     }
1684
1685     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1686     // of pixels. See e.g. wxVScrolledWindow for ideas.
1687     int pixelsPerUnit = 5;
1688     wxSize clientSize = GetClientSize();
1689
1690     int maxHeight = GetBuffer().GetCachedSize().y;
1691
1692     // Round up so we have at least maxHeight pixels
1693     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1694
1695     int startX = 0, startY = 0;
1696     if (!atTop)
1697         GetViewStart(& startX, & startY);
1698
1699     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1700     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1701
1702     // Move to previous scroll position if
1703     // possible
1704     SetScrollbars(0, pixelsPerUnit,
1705         0, unitsY,
1706         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1707 }
1708
1709 /// Paint the background
1710 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1711 {
1712     wxColour backgroundColour = GetBackgroundColour();
1713     if (!backgroundColour.Ok())
1714         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1715
1716     // Clear the background
1717     dc.SetBrush(wxBrush(backgroundColour));
1718     dc.SetPen(*wxTRANSPARENT_PEN);
1719     wxRect windowRect(GetClientSize());
1720     windowRect.x -= 2; windowRect.y -= 2;
1721     windowRect.width += 4; windowRect.height += 4;
1722
1723     // We need to shift the rectangle to take into account
1724     // scrolling. Converting device to logical coordinates.
1725     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1726     dc.DrawRectangle(windowRect);
1727 }
1728
1729 #if wxRICHTEXT_BUFFERED_PAINTING
1730 /// Recreate buffer bitmap if necessary
1731 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1732 {
1733     wxSize sz = size;
1734     if (sz == wxDefaultSize)
1735         sz = GetClientSize();
1736
1737     if (sz.x < 1 || sz.y < 1)
1738         return false;
1739
1740     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1741         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1742     return m_bufferBitmap.Ok();
1743 }
1744 #endif
1745
1746 // ----------------------------------------------------------------------------
1747 // file IO functions
1748 // ----------------------------------------------------------------------------
1749
1750 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1751 {
1752     bool success = GetBuffer().LoadFile(filename, fileType);
1753     if (success)
1754         m_filename = filename;
1755
1756     DiscardEdits();
1757     SetInsertionPoint(0);
1758     LayoutContent();
1759     PositionCaret();
1760     SetupScrollbars(true);
1761     Refresh(false);
1762     SendTextUpdatedEvent();
1763
1764     if (success)
1765         return true;
1766     else
1767     {
1768         wxLogError(_("File couldn't be loaded."));
1769
1770         return false;
1771     }
1772 }
1773
1774 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1775 {
1776     if (GetBuffer().SaveFile(filename, fileType))
1777     {
1778         m_filename = filename;
1779
1780         DiscardEdits();
1781
1782         return true;
1783     }
1784
1785     wxLogError(_("The text couldn't be saved."));
1786
1787     return false;
1788 }
1789
1790 // ----------------------------------------------------------------------------
1791 // wxRichTextCtrl specific functionality
1792 // ----------------------------------------------------------------------------
1793
1794 /// Add a new paragraph of text to the end of the buffer
1795 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1796 {
1797     return GetBuffer().AddParagraph(text);
1798 }
1799
1800 /// Add an image
1801 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1802 {
1803     return GetBuffer().AddImage(image);
1804 }
1805
1806 // ----------------------------------------------------------------------------
1807 // selection and ranges
1808 // ----------------------------------------------------------------------------
1809
1810 void wxRichTextCtrl::SelectAll()
1811 {
1812     SetSelection(0, GetLastPosition()+1);
1813     m_selectionAnchor = -1;
1814 }
1815
1816 /// Select none
1817 void wxRichTextCtrl::SelectNone()
1818 {
1819     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1820         SetSelection(-2, -2);
1821     m_selectionAnchor = -2;
1822 }
1823
1824 static bool wxIsWordDelimiter(const wxString& text)
1825 {
1826     return !text.IsEmpty() && !wxIsalnum(text[0]);
1827 }
1828
1829 /// Select the word at the given character position
1830 bool wxRichTextCtrl::SelectWord(long position)
1831 {
1832     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1833         return false;
1834
1835     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1836     if (!para)
1837         return false;
1838
1839     long positionStart = position;
1840     long positionEnd = position;
1841
1842     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1843     {
1844         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1845         if (wxIsWordDelimiter(text))
1846         {
1847             positionStart ++;
1848             break;
1849         }
1850     }
1851     if (positionStart < para->GetRange().GetStart())
1852         positionStart = para->GetRange().GetStart();
1853
1854     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1855     {
1856         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1857         if (wxIsWordDelimiter(text))
1858         {
1859             positionEnd --;
1860             break;
1861         }
1862     }
1863     if (positionEnd >= para->GetRange().GetEnd())
1864         positionEnd = para->GetRange().GetEnd();
1865
1866     SetSelection(positionStart, positionEnd+1);
1867
1868     if (positionStart >= 0)
1869     {
1870         MoveCaret(positionStart-1, true);
1871         SetDefaultStyleToCursorStyle();
1872     }
1873
1874     return true;
1875 }
1876
1877 wxString wxRichTextCtrl::GetStringSelection() const
1878 {
1879     long from, to;
1880     GetSelection(&from, &to);
1881
1882     return GetRange(from, to);
1883 }
1884
1885 // ----------------------------------------------------------------------------
1886 // hit testing
1887 // ----------------------------------------------------------------------------
1888
1889 wxTextCtrlHitTestResult
1890 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
1891 {
1892     // implement in terms of the other overload as the native ports typically
1893     // can get the position and not (x, y) pair directly (although wxUniv
1894     // directly gets x and y -- and so overrides this method as well)
1895     long pos;
1896     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
1897
1898     if ( rc != wxTE_HT_UNKNOWN )
1899     {
1900         PositionToXY(pos, x, y);
1901     }
1902
1903     return rc;
1904 }
1905
1906 wxTextCtrlHitTestResult
1907 wxRichTextCtrl::HitTest(const wxPoint& pt,
1908                         long * pos) const
1909 {
1910     wxClientDC dc((wxRichTextCtrl*) this);
1911     ((wxRichTextCtrl*)this)->PrepareDC(dc);
1912
1913     // Buffer uses logical position (relative to start of buffer)
1914     // so convert
1915     wxPoint pt2 = GetLogicalPoint(pt);
1916
1917     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
1918
1919     switch ( hit )
1920     {
1921         case wxRICHTEXT_HITTEST_BEFORE:
1922             return wxTE_HT_BEFORE;
1923
1924         case wxRICHTEXT_HITTEST_AFTER:
1925             return wxTE_HT_BEYOND;
1926
1927         case wxRICHTEXT_HITTEST_ON:
1928             return wxTE_HT_ON_TEXT;
1929     }
1930
1931     return wxTE_HT_UNKNOWN;
1932 }
1933
1934 // ----------------------------------------------------------------------------
1935 // set/get the controls text
1936 // ----------------------------------------------------------------------------
1937
1938 wxString wxRichTextCtrl::GetValue() const
1939 {
1940     return GetBuffer().GetText();
1941 }
1942
1943 wxString wxRichTextCtrl::GetRange(long from, long to) const
1944 {
1945     // Public API for range is different from internals
1946     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
1947 }
1948
1949 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
1950 {
1951     Clear();
1952
1953     // if the text is long enough, it's faster to just set it instead of first
1954     // comparing it with the old one (chances are that it will be different
1955     // anyhow, this comparison is there to avoid flicker for small single-line
1956     // edit controls mostly)
1957     if ( (value.length() > 0x400) || (value != GetValue()) )
1958     {
1959         DoWriteText(value);
1960
1961         // for compatibility, don't move the cursor when doing SetValue()
1962         SetInsertionPoint(0);
1963     }
1964     else // same text
1965     {
1966         if ( flags & SetValue_SendEvent )
1967         {
1968             // still send an event for consistency
1969             SendTextUpdatedEvent();
1970         }
1971     }
1972
1973     // we should reset the modified flag even if the value didn't really change
1974
1975     // mark the control as being not dirty - we changed its text, not the
1976     // user
1977     DiscardEdits();
1978 }
1979
1980 void wxRichTextCtrl::WriteText(const wxString& value)
1981 {
1982     DoWriteText(value);
1983 }
1984
1985 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
1986 {
1987     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
1988
1989     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this);
1990
1991     if ( flags & SetValue_SendEvent )
1992         SendTextUpdatedEvent();
1993 }
1994
1995 void wxRichTextCtrl::AppendText(const wxString& text)
1996 {
1997     SetInsertionPointEnd();
1998
1999     WriteText(text);
2000 }
2001
2002 /// Write an image at the current insertion point
2003 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2004 {
2005     wxRichTextImageBlock imageBlock;
2006
2007     wxImage image2 = image;
2008     if (imageBlock.MakeImageBlock(image2, bitmapType))
2009         return WriteImage(imageBlock);
2010
2011     return false;
2012 }
2013
2014 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2015 {
2016     wxRichTextImageBlock imageBlock;
2017
2018     wxImage image;
2019     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2020         return WriteImage(imageBlock);
2021
2022     return false;
2023 }
2024
2025 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2026 {
2027     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2028 }
2029
2030 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2031 {
2032     if (bitmap.Ok())
2033     {
2034         wxRichTextImageBlock imageBlock;
2035
2036         wxImage image = bitmap.ConvertToImage();
2037         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2038             return WriteImage(imageBlock);
2039     }
2040
2041     return false;
2042 }
2043
2044 /// Insert a newline (actually paragraph) at the current insertion point.
2045 bool wxRichTextCtrl::Newline()
2046 {
2047     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2048 }
2049
2050
2051 // ----------------------------------------------------------------------------
2052 // Clipboard operations
2053 // ----------------------------------------------------------------------------
2054
2055 void wxRichTextCtrl::Copy()
2056 {
2057     if (CanCopy())
2058     {
2059         wxRichTextRange range = GetInternalSelectionRange();
2060         GetBuffer().CopyToClipboard(range);
2061     }
2062 }
2063
2064 void wxRichTextCtrl::Cut()
2065 {
2066     if (CanCut())
2067     {
2068         wxRichTextRange range = GetInternalSelectionRange();
2069         GetBuffer().CopyToClipboard(range);
2070
2071         DeleteSelectedContent();
2072         LayoutContent();
2073         Refresh(false);
2074     }
2075 }
2076
2077 void wxRichTextCtrl::Paste()
2078 {
2079     if (CanPaste())
2080     {
2081         BeginBatchUndo(_("Paste"));
2082
2083         long newPos = m_caretPosition;
2084         DeleteSelectedContent(& newPos);
2085
2086         GetBuffer().PasteFromClipboard(newPos);
2087
2088         EndBatchUndo();
2089     }
2090 }
2091
2092 void wxRichTextCtrl::DeleteSelection()
2093 {
2094     if (CanDeleteSelection())
2095     {
2096         DeleteSelectedContent();
2097     }
2098 }
2099
2100 bool wxRichTextCtrl::HasSelection() const
2101 {
2102     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2103 }
2104
2105 bool wxRichTextCtrl::CanCopy() const
2106 {
2107     // Can copy if there's a selection
2108     return HasSelection();
2109 }
2110
2111 bool wxRichTextCtrl::CanCut() const
2112 {
2113     return HasSelection() && IsEditable();
2114 }
2115
2116 bool wxRichTextCtrl::CanPaste() const
2117 {
2118     if ( !IsEditable() )
2119         return false;
2120
2121     return GetBuffer().CanPasteFromClipboard();
2122 }
2123
2124 bool wxRichTextCtrl::CanDeleteSelection() const
2125 {
2126     return HasSelection() && IsEditable();
2127 }
2128
2129
2130 // ----------------------------------------------------------------------------
2131 // Accessors
2132 // ----------------------------------------------------------------------------
2133
2134 void wxRichTextCtrl::SetEditable(bool editable)
2135 {
2136     m_editable = editable;
2137 }
2138
2139 void wxRichTextCtrl::SetInsertionPoint(long pos)
2140 {
2141     SelectNone();
2142
2143     m_caretPosition = pos - 1;
2144 }
2145
2146 void wxRichTextCtrl::SetInsertionPointEnd()
2147 {
2148     long pos = GetLastPosition();
2149     SetInsertionPoint(pos);
2150 }
2151
2152 long wxRichTextCtrl::GetInsertionPoint() const
2153 {
2154     return m_caretPosition+1;
2155 }
2156
2157 wxTextPos wxRichTextCtrl::GetLastPosition() const
2158 {
2159     return GetBuffer().GetRange().GetEnd();
2160 }
2161
2162 // If the return values from and to are the same, there is no
2163 // selection.
2164 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2165 {
2166     *from = m_selectionRange.GetStart();
2167     *to = m_selectionRange.GetEnd();
2168     if ((*to) != -1 && (*to) != -2)
2169         (*to) ++;
2170 }
2171
2172 bool wxRichTextCtrl::IsEditable() const
2173 {
2174     return m_editable;
2175 }
2176
2177 // ----------------------------------------------------------------------------
2178 // selection
2179 // ----------------------------------------------------------------------------
2180
2181 void wxRichTextCtrl::SetSelection(long from, long to)
2182 {
2183     // if from and to are both -1, it means (in wxWidgets) that all text should
2184     // be selected.
2185     if ( (from == -1) && (to == -1) )
2186     {
2187         from = 0;
2188         to = GetLastPosition()+1;
2189     }
2190
2191     DoSetSelection(from, to);
2192 }
2193
2194 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2195 {
2196     m_selectionAnchor = from;
2197     m_selectionRange.SetRange(from, to-1);
2198
2199     Refresh(false);
2200     PositionCaret();
2201 }
2202
2203 // ----------------------------------------------------------------------------
2204 // Editing
2205 // ----------------------------------------------------------------------------
2206
2207 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2208                              const wxString& value)
2209 {
2210     BeginBatchUndo(_("Replace"));
2211
2212     DeleteSelectedContent();
2213
2214     DoWriteText(value, SetValue_SelectionOnly);
2215
2216     EndBatchUndo();
2217 }
2218
2219 void wxRichTextCtrl::Remove(long from, long to)
2220 {
2221     SelectNone();
2222
2223     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to),
2224         m_caretPosition,       // Current caret position
2225         from,                           // New caret position
2226         this);
2227
2228     LayoutContent();
2229     if (!IsFrozen())
2230         Refresh(false);
2231 }
2232
2233 bool wxRichTextCtrl::IsModified() const
2234 {
2235     return m_buffer.IsModified();
2236 }
2237
2238 void wxRichTextCtrl::MarkDirty()
2239 {
2240     m_buffer.Modify(true);
2241 }
2242
2243 void wxRichTextCtrl::DiscardEdits()
2244 {
2245     m_caretPositionForDefaultStyle = -2;
2246     m_buffer.Modify(false);
2247     m_buffer.GetCommandProcessor()->ClearCommands();
2248 }
2249
2250 int wxRichTextCtrl::GetNumberOfLines() const
2251 {
2252     return GetBuffer().GetParagraphCount();
2253 }
2254
2255 // ----------------------------------------------------------------------------
2256 // Positions <-> coords
2257 // ----------------------------------------------------------------------------
2258
2259 long wxRichTextCtrl::XYToPosition(long x, long y) const
2260 {
2261     return GetBuffer().XYToPosition(x, y);
2262 }
2263
2264 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2265 {
2266     return GetBuffer().PositionToXY(pos, x, y);
2267 }
2268
2269 // ----------------------------------------------------------------------------
2270 //
2271 // ----------------------------------------------------------------------------
2272
2273 void wxRichTextCtrl::ShowPosition(long pos)
2274 {
2275     if (!IsPositionVisible(pos))
2276         ScrollIntoView(pos-1, WXK_DOWN);
2277 }
2278
2279 int wxRichTextCtrl::GetLineLength(long lineNo) const
2280 {
2281     return GetBuffer().GetParagraphLength(lineNo);
2282 }
2283
2284 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2285 {
2286     return GetBuffer().GetParagraphText(lineNo);
2287 }
2288
2289 // ----------------------------------------------------------------------------
2290 // Undo/redo
2291 // ----------------------------------------------------------------------------
2292
2293 void wxRichTextCtrl::Undo()
2294 {
2295     if (CanUndo())
2296     {
2297         GetCommandProcessor()->Undo();
2298     }
2299 }
2300
2301 void wxRichTextCtrl::Redo()
2302 {
2303     if (CanRedo())
2304     {
2305         GetCommandProcessor()->Redo();
2306     }
2307 }
2308
2309 bool wxRichTextCtrl::CanUndo() const
2310 {
2311     return GetCommandProcessor()->CanUndo();
2312 }
2313
2314 bool wxRichTextCtrl::CanRedo() const
2315 {
2316     return GetCommandProcessor()->CanRedo();
2317 }
2318
2319 // ----------------------------------------------------------------------------
2320 // implementation details
2321 // ----------------------------------------------------------------------------
2322
2323 void wxRichTextCtrl::Command(wxCommandEvent& event)
2324 {
2325     SetValue(event.GetString());
2326     GetEventHandler()->ProcessEvent(event);
2327 }
2328
2329 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2330 {
2331     // By default, load the first file into the text window.
2332     if (event.GetNumberOfFiles() > 0)
2333     {
2334         LoadFile(event.GetFiles()[0]);
2335     }
2336 }
2337
2338 wxSize wxRichTextCtrl::DoGetBestSize() const
2339 {
2340     return wxSize(10, 10);
2341 }
2342
2343 // ----------------------------------------------------------------------------
2344 // standard handlers for standard edit menu events
2345 // ----------------------------------------------------------------------------
2346
2347 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2348 {
2349     Cut();
2350 }
2351
2352 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2353 {
2354     DeleteSelection();
2355 }
2356
2357 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2358 {
2359     Copy();
2360 }
2361
2362 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2363 {
2364     Paste();
2365 }
2366
2367 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2368 {
2369     Undo();
2370 }
2371
2372 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2373 {
2374     Redo();
2375 }
2376
2377 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2378 {
2379     event.Enable( CanCut() );
2380 }
2381
2382 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2383 {
2384     event.Enable( CanCopy() );
2385 }
2386
2387 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2388 {
2389     event.Enable( CanDeleteSelection() );
2390 }
2391
2392 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2393 {
2394     event.Enable( CanPaste() );
2395 }
2396
2397 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2398 {
2399     event.Enable( CanUndo() );
2400     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2401 }
2402
2403 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2404 {
2405     event.Enable( CanRedo() );
2406     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2407 }
2408
2409 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2410 {
2411     SelectAll();
2412 }
2413
2414 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2415 {
2416     event.Enable(GetLastPosition() > 0);
2417 }
2418
2419 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& WXUNUSED(event))
2420 {
2421     if (!m_contextMenu)
2422     {
2423         m_contextMenu = new wxMenu;
2424         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2425         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2426         m_contextMenu->AppendSeparator();
2427         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2428         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2429         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2430         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2431         m_contextMenu->AppendSeparator();
2432         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2433     }
2434     PopupMenu(m_contextMenu);
2435     return;
2436 }
2437
2438 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2439 {
2440     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2441 }
2442
2443 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2444 {
2445     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2446 }
2447
2448 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2449 {
2450     return GetBuffer().SetStyle(range.ToInternal(), style);
2451 }
2452
2453 // extended style setting operation with flags including:
2454 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2455 // see richtextbuffer.h for more details.
2456 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2457 {
2458     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2459 }
2460
2461 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2462 {
2463     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2464 }
2465
2466 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2467 {
2468     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2469 }
2470
2471 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2472 {
2473     return GetBuffer().SetDefaultStyle(style);
2474 }
2475
2476 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2477 {
2478     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2479 }
2480
2481 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2482 {
2483     return GetBuffer().GetDefaultStyle();
2484 }
2485
2486 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2487 {
2488     return GetBuffer().GetDefaultStyle();
2489 }
2490
2491 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2492 {
2493     wxTextAttrEx attr(style);
2494     if (GetBuffer().GetStyle(position, attr))
2495     {
2496         style = attr;
2497         return true;
2498     }
2499     else
2500         return false;
2501 }
2502
2503 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2504 {
2505     return GetBuffer().GetStyle(position, style);
2506 }
2507
2508 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2509 {
2510     return GetBuffer().GetStyle(position, style);
2511 }
2512
2513 /// Get the content (uncombined) attributes for this position.
2514
2515 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2516 {
2517     wxTextAttrEx attr(style);
2518     if (GetBuffer().GetUncombinedStyle(position, attr))
2519     {
2520         style = attr;
2521         return true;
2522     }
2523     else
2524         return false;
2525 }
2526
2527 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2528 {
2529     return GetBuffer().GetUncombinedStyle(position, style);
2530 }
2531
2532 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2533 {
2534     return GetBuffer().GetUncombinedStyle(position, style);
2535 }
2536
2537 /// Set font, and also the buffer attributes
2538 bool wxRichTextCtrl::SetFont(const wxFont& font)
2539 {
2540     wxControl::SetFont(font);
2541
2542     wxTextAttrEx attr = GetBuffer().GetAttributes();
2543     attr.SetFont(font);
2544     GetBuffer().SetBasicStyle(attr);
2545
2546     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2547     Refresh(false);
2548
2549     return true;
2550 }
2551
2552 /// Transform logical to physical
2553 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2554 {
2555     wxPoint pt;
2556     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2557
2558     return pt;
2559 }
2560
2561 /// Transform physical to logical
2562 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2563 {
2564     wxPoint pt;
2565     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2566
2567     return pt;
2568 }
2569
2570 /// Position the caret
2571 void wxRichTextCtrl::PositionCaret()
2572 {
2573     if (!GetCaret())
2574         return;
2575
2576     //wxLogDebug(wxT("PositionCaret"));
2577
2578     wxRect caretRect;
2579     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2580     {
2581         wxPoint originalPt = caretRect.GetPosition();
2582         wxPoint pt = GetPhysicalPoint(originalPt);
2583         if (GetCaret()->GetPosition() != pt)
2584         {
2585             GetCaret()->Move(pt);
2586             GetCaret()->SetSize(caretRect.GetSize());
2587         }
2588     }
2589 }
2590
2591 /// Get the caret height and position for the given character position
2592 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2593 {
2594     wxClientDC dc(this);
2595     dc.SetFont(GetFont());
2596
2597     PrepareDC(dc);
2598
2599     wxPoint pt;
2600     int height = 0;
2601
2602     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2603     {
2604         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2605         return true;
2606     }
2607
2608     return false;
2609 }
2610
2611 /// Gets the line for the visible caret position. If the caret is
2612 /// shown at the very end of the line, it means the next character is actually
2613 /// on the following line. So let's get the line we're expecting to find
2614 /// if this is the case.
2615 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2616 {
2617     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2618     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2619     if (line)
2620     {
2621         wxRichTextRange lineRange = line->GetAbsoluteRange();
2622         if (caretPosition == lineRange.GetStart()-1 &&
2623             (para->GetRange().GetStart() != lineRange.GetStart()))
2624         {
2625             if (!m_caretAtLineStart)
2626                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2627         }
2628     }
2629     return line;
2630 }
2631
2632
2633 /// Move the caret to the given character position
2634 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2635 {
2636     if (GetBuffer().GetDirty())
2637         LayoutContent();
2638
2639     if (pos <= GetBuffer().GetRange().GetEnd())
2640     {
2641         SetCaretPosition(pos, showAtLineStart);
2642
2643         PositionCaret();
2644
2645         return true;
2646     }
2647     else
2648         return false;
2649 }
2650
2651 /// Layout the buffer: which we must do before certain operations, such as
2652 /// setting the caret position.
2653 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2654 {
2655     if (GetBuffer().GetDirty() || onlyVisibleRect)
2656     {
2657         wxRect availableSpace(GetClientSize());
2658         if (availableSpace.width == 0)
2659             availableSpace.width = 10;
2660         if (availableSpace.height == 0)
2661             availableSpace.height = 10;
2662
2663         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2664         if (onlyVisibleRect)
2665         {
2666             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2667             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2668         }
2669
2670         wxClientDC dc(this);
2671         dc.SetFont(GetFont());
2672
2673         PrepareDC(dc);
2674
2675         GetBuffer().Defragment();
2676         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2677         GetBuffer().Layout(dc, availableSpace, flags);
2678         GetBuffer().SetDirty(false);
2679
2680         if (!IsFrozen())
2681             SetupScrollbars();
2682     }
2683
2684     return true;
2685 }
2686
2687 /// Is all of the selection bold?
2688 bool wxRichTextCtrl::IsSelectionBold()
2689 {
2690     if (HasSelection())
2691     {
2692         wxRichTextAttr attr;
2693         wxRichTextRange range = GetInternalSelectionRange();
2694         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2695         attr.SetFontWeight(wxBOLD);
2696
2697         return HasCharacterAttributes(range, attr);
2698     }
2699     else
2700     {
2701         // If no selection, then we need to combine current style with default style
2702         // to see what the effect would be if we started typing.
2703         wxRichTextAttr attr;
2704         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2705
2706         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2707         if (GetStyle(pos, attr))
2708         {
2709             if (IsDefaultStyleShowing())
2710                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2711             return attr.GetFontWeight() == wxBOLD;
2712         }
2713     }
2714     return false;
2715 }
2716
2717 /// Is all of the selection italics?
2718 bool wxRichTextCtrl::IsSelectionItalics()
2719 {
2720     if (HasSelection())
2721     {
2722         wxRichTextRange range = GetInternalSelectionRange();
2723         wxRichTextAttr attr;
2724         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2725         attr.SetFontStyle(wxITALIC);
2726
2727         return HasCharacterAttributes(range, attr);
2728     }
2729     else
2730     {
2731         // If no selection, then we need to combine current style with default style
2732         // to see what the effect would be if we started typing.
2733         wxRichTextAttr attr;
2734         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2735
2736         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2737         if (GetStyle(pos, attr))
2738         {
2739             if (IsDefaultStyleShowing())
2740                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2741             return attr.GetFontStyle() == wxITALIC;
2742         }
2743     }
2744     return false;
2745 }
2746
2747 /// Is all of the selection underlined?
2748 bool wxRichTextCtrl::IsSelectionUnderlined()
2749 {
2750     if (HasSelection())
2751     {
2752         wxRichTextRange range = GetInternalSelectionRange();
2753         wxRichTextAttr attr;
2754         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2755         attr.SetFontUnderlined(true);
2756
2757         return HasCharacterAttributes(range, attr);
2758     }
2759     else
2760     {
2761         // If no selection, then we need to combine current style with default style
2762         // to see what the effect would be if we started typing.
2763         wxRichTextAttr attr;
2764         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2765         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2766
2767         if (GetStyle(pos, attr))
2768         {
2769             if (IsDefaultStyleShowing())
2770                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2771             return attr.GetFontUnderlined();
2772         }
2773     }
2774     return false;
2775 }
2776
2777 /// Apply bold to the selection
2778 bool wxRichTextCtrl::ApplyBoldToSelection()
2779 {
2780     wxRichTextAttr attr;
2781     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2782     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2783
2784     if (HasSelection())
2785         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2786     else
2787         SetAndShowDefaultStyle(attr);
2788     return true;
2789 }
2790
2791 /// Apply italic to the selection
2792 bool wxRichTextCtrl::ApplyItalicToSelection()
2793 {
2794     wxRichTextAttr attr;
2795     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2796     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2797
2798     if (HasSelection())
2799         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2800     else
2801         SetAndShowDefaultStyle(attr);
2802     return true;
2803 }
2804
2805 /// Apply underline to the selection
2806 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2807 {
2808     wxRichTextAttr attr;
2809     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2810     attr.SetFontUnderlined(!IsSelectionUnderlined());
2811
2812     if (HasSelection())
2813         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2814     else
2815         SetAndShowDefaultStyle(attr);
2816     return true;
2817 }
2818
2819 /// Is all of the selection aligned according to the specified flag?
2820 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2821 {
2822     wxRichTextRange range;
2823     if (HasSelection())
2824         range = GetInternalSelectionRange();
2825     else
2826         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+1);
2827
2828     wxRichTextAttr attr;
2829     attr.SetAlignment(alignment);
2830
2831     return HasParagraphAttributes(range, attr);
2832 }
2833
2834 /// Apply alignment to the selection
2835 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2836 {
2837     wxRichTextAttr attr;
2838     attr.SetAlignment(alignment);
2839     if (HasSelection())
2840         return SetStyle(GetSelectionRange(), attr);
2841     else
2842     {
2843         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2844         if (para)
2845             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2846     }
2847     return true;
2848 }
2849
2850 /// Apply a named style to the selection
2851 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2852 {
2853     // Flags are defined within each definition, so only certain
2854     // attributes are applied.
2855     wxRichTextAttr attr(def->GetStyle());
2856
2857     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2858
2859     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2860     {
2861         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2862
2863         wxRichTextRange range;
2864
2865         if (HasSelection())
2866             range = GetSelectionRange();
2867         else
2868         {
2869             long pos = GetAdjustedCaretPosition(GetCaretPosition());
2870             range = wxRichTextRange(pos, pos+1);
2871         }
2872
2873         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
2874     }
2875
2876     // Make sure the attr has the style name
2877     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
2878     {
2879         attr.SetParagraphStyleName(def->GetName());
2880
2881         // If applying a paragraph style, we only want the paragraph nodes to adopt these
2882         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
2883         // to change its style independently.
2884         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2885     }
2886     else
2887         attr.SetCharacterStyleName(def->GetName());
2888
2889     if (HasSelection())
2890         return SetStyleEx(GetSelectionRange(), attr, flags);
2891     else
2892     {
2893         SetAndShowDefaultStyle(attr);
2894         return true;
2895     }
2896 }
2897
2898 /// Apply the style sheet to the buffer, for example if the styles have changed.
2899 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
2900 {
2901     if (!styleSheet)
2902         styleSheet = GetBuffer().GetStyleSheet();
2903     if (!styleSheet)
2904         return false;
2905
2906     if (GetBuffer().ApplyStyleSheet(styleSheet))
2907     {
2908         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2909         Refresh(false);
2910         return true;
2911     }
2912     else
2913         return false;
2914 }
2915
2916 /// Sets the default style to the style under the cursor
2917 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
2918 {
2919     wxTextAttrEx attr;
2920     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
2921
2922     // If at the start of a paragraph, use the next position.
2923     long pos = GetAdjustedCaretPosition(GetCaretPosition());
2924
2925 #if wxRICHTEXT_USE_DYNAMIC_STYLES
2926     if (GetUncombinedStyle(pos, attr))
2927 #else
2928     if (GetStyle(pos, attr))
2929 #endif
2930     {
2931         SetDefaultStyle(attr);
2932         return true;
2933     }
2934
2935     return false;
2936 }
2937
2938 /// Returns the first visible position in the current view
2939 long wxRichTextCtrl::GetFirstVisiblePosition() const
2940 {
2941     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
2942     if (line)
2943         return line->GetAbsoluteRange().GetStart();
2944     else
2945         return 0;
2946 }
2947
2948 /// The adjusted caret position is the character position adjusted to take
2949 /// into account whether we're at the start of a paragraph, in which case
2950 /// style information should be taken from the next position, not current one.
2951 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
2952 {
2953     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
2954
2955     if (para && (caretPos+1 == para->GetRange().GetStart()))
2956         caretPos ++;
2957     return caretPos;
2958 }
2959
2960 /// Get/set the selection range in character positions. -1, -1 means no selection.
2961 /// The range is in API convention, i.e. a single character selection is denoted
2962 /// by (n, n+1)
2963 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
2964 {
2965     wxRichTextRange range = GetInternalSelectionRange();
2966     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
2967         range.SetEnd(range.GetEnd() + 1);
2968     return range;
2969 }
2970
2971 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
2972 {
2973     wxRichTextRange range1(range);
2974     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
2975         range1.SetEnd(range1.GetEnd() - 1);
2976
2977     wxASSERT( range1.GetStart() > range1.GetEnd() );
2978
2979     SetInternalSelectionRange(range1);
2980 }
2981
2982 /// Set list style
2983 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
2984 {
2985     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
2986 }
2987
2988 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
2989 {
2990     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
2991 }
2992
2993 /// Clear list for given range
2994 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
2995 {
2996     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
2997 }
2998
2999 /// Number/renumber any list elements in the given range
3000 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3001 {
3002     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3003 }
3004
3005 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3006 {
3007     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3008 }
3009
3010 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3011 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3012 {
3013     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3014 }
3015
3016 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3017 {
3018     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3019 }
3020
3021 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3022 {
3023     if (sm_availableFontNames.GetCount() == 0)
3024     {
3025         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3026         sm_availableFontNames.Sort();
3027     }
3028     return sm_availableFontNames;
3029 }
3030
3031 void wxRichTextCtrl::ClearAvailableFontNames()
3032 {
3033     sm_availableFontNames.Clear();
3034 }
3035
3036 #endif
3037     // wxUSE_RICHTEXT